B16.9 Carton steel blind flange

BL blind stainless steel RF flanges

Blind flanges are used to blank off pipelines, valves and pumps. They can also be used as an inspection cover. It is sometimes referred to as a blanking flange.

Blind Flange - A Blind flange is round plate which has all of the relevant boltholes but no centre hole, and because of this feature this flange is used to close off the ends of a piping systems and pressure vessel openings. It also permits easy access to vessels or Piping systems for inspection purposes.

Standards: ASME B16.47, ANSI B16.5, DIN, UNI, BS, JIS, GB.if you are intered in our product, you may go to website:www.bd pipefitting.com

Pressure classes range: from 150lbs to 2,500lbs.

Sizes range: 1/2" - 24" .

Materials: F316, F304, F316L, F304L, A105, F5, F11, F22, 15CrMo, 12CrMoV, Q235, 16Mn, 20#.

Printing: Carbon steel and alloy steel with yellow print, black print, oil or zinc.

Blind Flanges
Class 150LB

Blind Flanges Class 150LB	Blind forged flanges of class 150LB
Standard	ASME B16.5
Core Material	Carbon steel and stainless steel
Connecting Finish	Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule	See sheets of pipe schedule for carbon steel , and for stainless steel

Size inch	D mm	G mm	t mm
1/2	89	35.1	11.2
3/4	99	42.9	12.7
1	108	50.8	14.2
1¼	117	63.5	15.7
1½	127	73.2	17.5
2	152	91.9	19.1
2½	178	104.6	22.4
3	191	127.0	23.9
3½	216	139.7	23.9
4	229	157.2	23.9
5	254	185.7	23.9
6	279	215.9	25.4
8	343	269.7	28.4
10	406	323.9	30.2
12	483	381.0	31.8
14	533	412.8	35.1
16	597	469.9	36.6
18	635	533.4	39.6
20	699	584.2	42.9
24	813	692.2	47.8

Size	Drilling			Bolting
inch	Bolt circle Ø mm	Qty of holes	Holes Ø mm	Bolt Ø inch	Length mach bolt (RF)	Length stud bolt  (RF)	Length stud bolt (RJ)
1/2	60.5	4	15.7	1/2	50.8	57.2	-
3/4	69.9	4	15.7	1/2	50.8	63.5	-
1	79.2	4	15.7	1/2	57.2	63.5	76.2
1¼	88.9	4	15.7	1/2	57.2	69.9	82.6
1½	98.6	4	15.7	1/2	63.5	69.9	82.6
2	120.7	4	19.1	5/8	69.9	82.6	95.3
2½	139.7	4	19.1	5/8	76.2	88.9	101.6
3	152.4	4	19.1	5/8	76.2	88.9	101.6
3½	177.8	8	19.1	5/8	76.2	88.9	101.6
4	190.5	8	19.1	5/8	76.2	88.9	101.6
5	215.9	8	22.4	3/4	82.6	95.3	108.0
6	241.3	8	22.4	3/4	82.6	101.6	114.3
8	298.5	8	22.4	3/4	88.9	108.0	120.7
10	362.0	12	25.4	7/8	101.6	114.3	127.0
12	431.8	12	25.4	7/8	101.6	120.7	133.4
14	476.3	12	28.4	1	114.3	133.4	146.1
16	539.8	16	28.4	1	114.3	133.4	146.1
18	577.9	16	31.8	11/8	127.0	146.1	158.8
20	635.0	20	31.8	11/8	139.7	158.8	171.5
24	749.3	20	35.1	1¼	152.4	171.5	184.2

Blind Flanges
Class 300LB

Blind Flanges Class 300LB	Blind forged flanges of class 300LB
Standard	ASME B16.5
Core Material	Carbon steel and stainless steel
Connecting Finish	Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule	See sheets of pipe schedule for carbon steel here, and for stainless steel here

Size inch	D mm	G mm	t mm
1/2	95	35.1	14.2
3/4	117	42.9	15.7
1	124	50.8	17.5
1¼	133	63.5	19.1
1½	155	73.2	20.6
2	165	91.9	22.4
2½	191	104.6	25.4
3	210	127.0	28.4
3½	229	139.7	30.2
4	254	157.2	31.8
5	279	185.7	35.1
6	318	215.9	36.6
8	381	269.7	41.1
10	445	323.9	47.8
12	521	381.0	50.8
14	584	412.8	63.8
16	648	469.9	57.2
18	711	533.4	60.5
20	775	584.2	63.5
24	914	692.2	69.9

Size	Drilling			Bolting
inch	Bolt circle Ø mm	Qty of holes	Holes Ø mm	Bolt Ø inch	Length mach bolt (RF)	Length stud bolt  (RF)	Length stud bolt (RJ)
1/2	66.5	4	15.7	1/2	57.2	63.5	76.2
3/4	82.6	4	19.1	5/8	63.5	76.2	88.9
1	88.9	4	19.1	5/8	63.5	76.2	88.9
1¼	98.6	4	19.1	5/8	69.9	82.6	95.3
1½	114.3	4	22.4	3/4	76.2	88.9	101.6
2	127.0	8	19.1	5/8	76.2	88.9	101.6
2½	149.4	8	22.4	3/4	82.6	101.6	114.3
3	168.1	8	22.4	3/4	88.9	108.0	120.7
3½	184.2	8	22.4	3/4	95.3	108.0	127.0
4	200.2	8	22.4	3/4	95.3	114.3	127.0
5	235.0	8	22.4	3/4	108.0	120.7	133.4
6	269.7	12	22.4	3/4	108.0	120.7	139.7
8	330.2	12	25.4	7/8	120.7	139.7	152.4
10	387.4	16	28.4	1	139.7	158.8	171.5
12	450.9	16	31.8	11/8	146.1	171.5	184.2
14	514.4	20	31.8	11/8	158.8	177.8	190.5
16	571.5	20	35.1	1¼	165.1	190.5	203.2
18	628.7	24	35.1	1¼	171.5	196.9	209.6
20	685.8	24	35.1	1¼	184.2	203.2	222.3
24	812.8	24	41.1	1½	203.2	228.6	254.0

Blind Flanges
Class 600LB

Blind Flanges Class 600LB	Blind forged flanges of class 600LB
Standard	ASME B16.5
Core Material	Carbon steel and stainless steel
Connecting Finish	Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule	See sheets of pipe schedule for carbon steel , and for stainless steel

Size inch	D mm	G mm	t mm
1/2	95	35.1	14.2
3/4	117	42.9	15.7
1	124	50.8	17.5
1¼	133	63.5	20.6
1½	155	73.2	22.4
2	165	91.9	25.4
2½	191	104.6	28.4
3	210	127.0	31.8
3½	229	139.7	35.1
4	273	157.2	38.1
5	330	185.7	44.5
6	356	215.9	47.8
8	419	269.7	55.6
10	508	323.9	63.5
12	559	381.0	66.5
14	603	412.8	69.9
16	686	469.9	76.2
18	743	533.4	82.6
20	813	584.2	88.9
24	940	692.2	101.6

Size	Drilling			Bolting
inch	Bolt circle Ø mm	Qty of holes	Holes Ø mm	Bolt Ø inch	Length mach bolt (RF)	Length stud bolt  (RF)	Length stud bolt (RJ)
1/2	66.5	4	15.7	1/2	76.2	69.9	76.2
3/4	82.6	4	19.1	5/8	88.9	82.6	88.9
1	88.9	4	19.1	5/8	88.9	82.6	88.9
1¼	98.6	4	19.1	5/8	95.3	88.9	95.3
1½	114.3	4	22.4	3/4	108.0	101.6	108.0
2	127.0	8	19.1	5/8	108.0	101.6	108.0
2½	149.4	8	22.4	3/4	120.7	114.3	120.7
3	168.1	8	22.4	3/4	127.0	120.7	127.0
3½	184.2	8	25.4	7/8	139.7	133.4	139.7
4	215.9	8	25.4	7/8	146.1	139.7	146.1
5	266.7	8	28.4	1	165.1	158.8	165.1
6	292.1	12	28.4	1	171.5	165.1	171.5
8	349.3	12	31.8	11/8	190.5	184.2	196.9
10	431.8	16	35.1	1¼	215.9	209.6	215.9
12	489.0	20	35.1	1¼	222.3	215.9	222.3
14	527.1	20	38.1	13/8	235.0	228.6	235.0
16	603.3	20	41.1	1½	254.0	247.7	254.0
18	654.1	20	44.5	15/8	273.1	266.7	273.1
20	723.9	24	44.5	15/8	285.8	279.4	292.1
24	838.2	24	50.8	17/8	330.2	323.9	336.6

Blind Flanges
Class 900LB

Blind Flanges Class 900LB	Blind forged flanges of class 900LB
Standard	ASME B16.5
Core Material	Carbon steel and stainless steel
Connecting Finish	Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule	See sheets of pipe schedule for carbon steel  and for stainless steel

Size inch	D mm	G mm	t mm
1/2	121	35.1	22.4
3/4	130	42.9	25.4
1	149	50.8	28.4
1¼	159	63.5	28.4
1½	178	73.2	31.8
2	216	91.9	38.1
2½	244	104.6	41.1
3	241	127.0	38.1
4	292	157.2	44.5
5	349	185.7	50.8
6	381	215.9	55.6
8	470	269.7	63.5
10	546	323.9	69.9
12	610	381.0	79.2
14	641	412.8	85.9
16	705	469.9	88.9
18	787	533.4	101.6
20	857	584.2	108.0
24	1041	692.2	139.7

Size	Drilling			Bolting
inch	Bolt circle Ø mm	Qty of holes	Holes Ø mm	Bolt Ø inch	Length mach bolt (RF)	Length stud bolt  (RF)	Length stud bolt (RJ)
1/2	82.6	4	22.4	3/4	108.0	101.6	108.0
3/4	88.9	4	22.4	3/4	114.3	108.0	114.3
1	101.6	4	25.4	7/8	127.0	120.7	127.0
1¼	111.3	4	25.4	7/8	127.0	120.7	127.0
1½	124.0	4	28.4	1	139.7	133.4	139.7
2	165.1	8	25.4	7/8	146.1	139.7	146.1
2½	190.5	8	28.4	1	158.8	152.4	158.8
3	190.5	8	25.4	7/8	146.1	139.7	146.1
4	235.0	8	31.8	11/8	171.5	165.1	171.5
5	279.4	8	35.1	1¼	190.5	184.2	190.5
6	317.5	12	31.8	11/8	190.5	184.2	196.9
8	393.7	12	38.1	13/8	222.3	215.9	222.3
10	469.9	16	38.1	13/8	235.0	228.6	235.0
12	533.4	20	38.1	13/8	254.0	247.7	254.0
14	558.8	20	41.1	1½	273.1	266.7	292.1
16	616.0	20	44.5	15/8	285.8	279.4	298.5
18	685.8	20	50.8	17/8	323.9	317.5	333.6
20	749.3	20	53.8	2	349.3	342.9	362.0
24	901.7	20	66.5	1½	438.2	431.8	457.

Flange Type :

Thread Flange

Blind Flange

Slip On Flange

Weld Neck Flange

Spectacle Blind Flange

Spacer & Spade

LWN Flange

Orifice Flange

Raised Face Weld Neck Flange

Stainless Steel Flange

A234wp11 Pipe Fitting

Stainless Steel Blind Flange

Raised Face Blind Flange